Sylvania 18457 - 50/150/A21/W/2PK - 3-Way Soft White Incandescent Light Bulb, 50/100/150 Watt (2 Pack) 120 V. Interior Light output: 50W = 640 lumens; 100W = 1570 lumens; 150W = 2210 lumens. Life: 1200 hours. Made in USA. Use in regular 3-way socket. Screw firmly (but not forcibly) into socket, otherwise only one filament may light due to socket condition.